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I²C Clock Stretching Implementation for LM4F / TM4C #375

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I²C Clock Stretching Implementation for LM4F / TM4C #375

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I²C clock stretching implementation by pulling SCL line low

@rei-vilo rei-vilo mentioned this pull request Apr 21, 2014
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rei-vilo reviewed Apr 28, 2014
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hardware/lm4f/libraries/Wire/Wire.cpp
void TwoWire::pause()
{
// Standard output
GPIOPadConfigSet(g_uli2cBase[i2cModule], g_uli2cSCLPins[i2cModule], GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
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GPIO_STRENGTH_2MA works fine also.

@rei-vilo rei-vilo changed the title I²C Clock Stretching Implementation I²C Clock Stretching Implementation fro LM4F / TM4C May 7, 2014
@rei-vilo rei-vilo changed the title I²C Clock Stretching Implementation fro LM4F / TM4C I²C Clock Stretching Implementation for LM4F / TM4C May 7, 2014
@rei-vilo rei-vilo mentioned this pull request Jun 2, 2014
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rei-vilo commented Jun 2, 2014

Combining the clock-stretching related functions pause() and resume() with the fast mode and fast mode plus implementation #343 doesn't seem to work.

Configuration

  • Both master and slave are LaunchPad LM4F or TM4C.
  • Pull-up resistors of 10 kΩ.
  • No problem if master is an Arduino board interfaced with a logic level converter.

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